Concentrations - Summary of Net Revenue from Various Products (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Concentration Risk [Line Items]
Total net revenue	$ 12,010	$ 9,531	$ 34,411	$ 26,780
Percentage of sales	100.00%	100.00%	100.00%	100.00%
Laser systems
Concentration Risk [Line Items]
Total net revenue	$ 7,302	$ 6,084	$ 21,626	$ 16,588
Laser systems | Product Concentration Risk | Sales Revenue, Net
Concentration Risk [Line Items]
Percentage of sales	60.80%	63.80%	62.90%	61.90%
Consumables and other
Concentration Risk [Line Items]
Total net revenue	$ 2,632	$ 2,331	$ 8,379	$ 6,923
Consumables and other | Product Concentration Risk | Sales Revenue, Net
Concentration Risk [Line Items]
Percentage of sales	21.90%	24.50%	24.30%	25.90%
Services
Concentration Risk [Line Items]
Total net revenue	$ 2,076	$ 1,116	$ 4,406	$ 3,269
Services | Product Concentration Risk | Sales Revenue, Net
Concentration Risk [Line Items]
Percentage of sales	17.30%	11.70%	12.80%	12.20%